Magisk/native/jni/include/db.h

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#pragma once
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#include <sys/stat.h>
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#include <map>
#include <string>
#include <string_view>
#include <functional>
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template <class T, size_t num>
class db_data_base {
public:
T& operator [](std::string_view key) {
return data[getKeyIdx(key)];
}
const T& operator [](std::string_view key) const {
return data[getKeyIdx(key)];
}
T& operator [](int key) {
return data[key];
}
const T& operator [](int key) const {
return data[key];
}
protected:
T data[num + 1];
virtual int getKeyIdx(std::string_view key) const = 0;
};
/***************
* DB Settings *
***************/
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#define DB_SETTING_KEYS \
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((const char *[]) { \
"root_access", \
"multiuser_mode", \
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"mnt_ns", \
"magiskhide", \
})
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#define DB_SETTINGS_NUM 4
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// Settings keys
enum {
ROOT_ACCESS = 0,
SU_MULTIUSER_MODE,
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SU_MNT_NS,
HIDE_CONFIG
};
// Values for root_access
enum {
ROOT_ACCESS_DISABLED = 0,
ROOT_ACCESS_APPS_ONLY,
ROOT_ACCESS_ADB_ONLY,
ROOT_ACCESS_APPS_AND_ADB
};
// Values for multiuser_mode
enum {
MULTIUSER_MODE_OWNER_ONLY = 0,
MULTIUSER_MODE_OWNER_MANAGED,
MULTIUSER_MODE_USER
};
// Values for mnt_ns
enum {
NAMESPACE_MODE_GLOBAL = 0,
NAMESPACE_MODE_REQUESTER,
NAMESPACE_MODE_ISOLATE
};
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class db_settings : public db_data_base<int, DB_SETTINGS_NUM> {
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public:
db_settings();
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protected:
int getKeyIdx(std::string_view key) const override;
};
/**************
* DB Strings *
**************/
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#define DB_STRING_KEYS \
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((const char *[]) { \
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"requester", \
})
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#define DB_STRING_NUM 1
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// Strings keys
enum {
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SU_MANAGER = 0
};
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class db_strings : public db_data_base<std::string, DB_STRING_NUM> {
protected:
int getKeyIdx(std::string_view key) const override;
};
/*************
* SU Access *
*************/
typedef enum {
QUERY = 0,
DENY = 1,
ALLOW = 2,
} policy_t;
struct su_access {
policy_t policy;
int log;
int notify;
};
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#define DEFAULT_SU_ACCESS (su_access) { \
.policy = QUERY, \
.log = 1, \
.notify = 1 \
}
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#define SILENT_SU_ACCESS (su_access) { \
.policy = ALLOW, \
.log = 0, \
.notify = 0 \
}
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#define NO_SU_ACCESS (su_access) { \
.policy = DENY, \
.log = 0, \
.notify = 0 \
}
/********************
* Public Functions *
********************/
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typedef std::map<std::string_view, std::string_view> db_row;
typedef std::function<bool(db_row&)> db_row_cb;
int get_db_settings(db_settings &cfg, int key = -1);
int get_db_strings(db_strings &str, int key = -1);
int get_uid_policy(su_access &su, int uid);
bool check_manager(std::string *pkg = nullptr);
bool validate_manager(std::string &pkg, int userid, struct stat *st);
void exec_sql(int client);
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char *db_exec(const char *sql);
char *db_exec(const char *sql, const db_row_cb &fn);
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bool db_err(char *e);
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#define db_err_cmd(e, cmd) if (db_err(e)) { cmd; }